TungNT (Blue)

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====== Strategy ======

<file php PaymentMethodInterface.php>
<?php

namespace App\Services\Payment;

interface PaymentMethodInterface
{                                
    /**
     * pay
     *
     * @return string
     */
    public function pay(): string;

}
</file>

<file php CreditCardService.php>
<?php

namespace App\Services\Payment;

/**
 * CreditCardService
 */
class CreditCardService implements PaymentMethodInterface
{                    
        
    /**
     * pay
     *
     * @return string
     */
    public function pay(): string{
        return 'CreditCard';
    }

}
</file>

<file php ApplePayService>
<?php

namespace App\Services\Payment;

/**
 * ApplePayService
 */
class ApplePayService implements PaymentMethodInterface
{                    
        
    /**
     * pay
     *
     * @return string
     */
    public function pay(): string{
        return 'ApplePay';
    }

}
</file>

<file php GooglePayService.php>
<?php

namespace App\Services\Payment;

/**
 * GooglePayService
 */
class GooglePayService implements PaymentMethodInterface
{                    
        
    /**
     * pay
     *
     * @return string
     */
    public function pay(): string{
        return 'GooglePay';
    }

}
</file>

<file php PaymentContextService.php>
<?php

namespace App\Services\Payment;

/**
 * PaymentContextService
 */
class PaymentContextService
{                    
        
    /**
     * @var PaymentMethodInterface
     */
    private $paymentMethod;
    
    /**
     * __construct
     *
     * @param  mixed $paymentMethod
     * @return void
     */
    public function __construct(string $paymentMethod)
    {     
        $this->paymentMethod = match ($paymentMethod){
            'credit' => new CreditCardService(),
            'apple' => new ApplePayService(),
            'google' => new GooglePayService(),
            default => throw new \InvalidArgumentException("You must pass in either credit, apple or google as the payment method.")
        };
    }
        
    /**
     * pay
     *
     * @return string
     */
    public function pay(){
        return $this->paymentMethod->pay();
    }

}
</file>

<file php StrategyCommand.php>
<?php

namespace App\Console\Commands\Test;

use App\Services\Payment\PaymentContextService;
use Illuminate\Console\Command;

/**
 * Class StrategyCommand
 * @package Modules\Web\Console\Commands
 */
class StrategyCommand extends Command
{
    /**
     * The console command name.
     *
     * @var string
     */
    protected $signature = 'test:strategy {paymentMethod}';
   
    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = "Test Cms module command";

public function handle(){
        //$result = $this->normal($this->argument('paymentMethod'));
        $result = $this->strategy($this->argument('paymentMethod'));

$this->line($result);
    }

private function strategy($paymentMethod){
        $payment = new PaymentContextService($paymentMethod);

return $payment->pay();
    }
    
    /**
     * normal
     *
     * @param  mixed $paymentMethod
     * @return string
     */
    private function normal($paymentMethod){
        if('credit' == $paymentMethod){
            return 'CreditCard';
        }

if('google' == $paymentMethod){
            return 'GooglePay';
        }
        
        if('apple' == $paymentMethod){
            return 'ApplePay';
        }
        
        throw new \InvalidArgumentException("You must pass in either credit, apple or google as the payment method.");
    }
}
</file>

====== Tham khảo ======

* https://refactoring.guru/design-patterns/strategy
  * https://www.youtube.com/watch?v=0VlakXgCukM
  * https://www.youtube.com/watch?v=sheV2IBlQkU

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